from abc import ABC, abstractmethod

__all__ = [
    "Dough", "Sauce", "Cheese", "Veggies", "Pepperoni", "Clams"
]

class Dough(ABC):
    @abstractmethod
    def __str__(self):
        ...


class Sauce(ABC):
    @abstractmethod
    def __str__(self):
        ...


class Cheese(ABC):
    @abstractmethod
    def __str__(self):
        ...


class Veggies(ABC):
    @abstractmethod
    def __str__(self):
        ...


class Pepperoni(ABC):
    @abstractmethod
    def __str__(self):
        ...


class Clams(ABC):
    @abstractmethod
    def __str__(self):
        ...